Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-25
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, talk given at the 4th International Workshop on the CKM Unitarity Triangle (CKM2006), 12-16 December 2006,
Scientific paper
We give an overview of various determinations of $\gamma/\phi_3$ with the help of $B_s$ decays into charmed final states, distinguishing between transitions with tree and penguin contributions and pure tree decays. In the corresponding strategies, the $U$-spin flavour symmetry of strong interactions provides a very useful tool, and offers interesting "by-producs" for the $B$-physics programme at the LHC, including the control of the penguin uncertainties in the determinations of the $B^0_d$-$\bar B^0_d$ and $B^0_s$--$\bar B^0_s$ mixing phases $\phi_d$ and $\phi_s$ from $B_d\to J/\psi K_S$ and $B_s\to J/\psi\phi$, respectively, and an alternative extraction of the latter phase through $B_s\to D_s^+D_s^-$. Finally, we point out that the cleanest determinations of the mixing phases $\phi_s$ and $\phi_d$ are offered by the pure tree decays $B_s\to D_\pm K_{S(L)}$ and $B_d\to D_\pm\pi^0, D_\pm\rho^0, ...$, respectively, which are very interesting for the searches of new physics.
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